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Mm The diameter of a cylindrical well is 4.5 m anddepth of the well is 14 m. Find the cost of itcementing its inner curved surface at the rate of₹12.50 per sq. metre. |
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Answer» adius= 2 3.5 =1.75 , h= DEPTH of the well=10m ⇒CURVED surface area =2πrh =(2× 7 22 ×1.75×10)m 2 =110m 2 ⇒(ii) COST of plastering = Rs 40 per m 2 The cost of plastering the curved surface = Rs (110×40)= Rs 4400. |
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